KBZ - 400, 200 a / 1140 (660) mining flameproof vacuum feed switch is suitable for containing methane gas mixture, with explosion danger in the coal mine.In ac 50 hz, voltage 1140 v power supply system, rated current 400 a three-phase supply and substation system of neutral point grounding directly, as a master switch, branch switch, also can be used as the large capacity motor not frequent starting control.
1.Filled with overload, short circuit, open phase or function can cut off power supply when the leakage
2.Is left as a master switch with three phase symmetry when leakage protection and leakage blocking protection function.
3.Cardiac proximal without pressure release outlet with large current protection circuit.
4.Cardiac methane electricity locking function, can be directly receive safety monitoring system of passive dynamic closed contact control signal, can be more than 2 km distance.
5.Has communication function: protector by RS485 or power line carrier communication interface can be related to protection setting value and failure to monitor from a distance, and the lateral load switch state to + / - 5 ma, 0-1-5 ma, 0-5-10 ma, substation of standard signal system into the safety monitoring system.